Cap seal



c. LllSClANl CAP SEAL Filed Sept. 17, 1953 March 4, 1958 Uniteds ates P t iifi" ,CAP SEAL Constantine Lisciani, Chicago, Ill., assignor to The Protectoseal Company, Chicago, 111., a corporation of Ellinois Application September 17, 1953, Serial No. 380,84

2 Claims. (Cl. 220-46) This invention relates to operating mechanisms for spout closures'of safety cans and more particularly to an improved spout closure and seal therefor.

With the earlier form of cap closures and seals in use with safety cans of the type as disclosed and claimed in the U. S. Patent to Lebus No. 2,574,876 granted November 13, 1951, the usual form of gaskets in the form of a gas-treated washer tended to become unsatisfactory after use with the high volatile and corrosive type of fluids which are disposed as waste in safety cans using the earlier form of cap seal. It is therefore, a principal object of the invention to provide a simple form of cap seal provided with resilient material to form a perfect seal and yet have sufficient resistance against the highly volatile fluids thus disposed.

Another object of the invention is to provide a simple cap seal which may be readily and economically manufactured in order that upon the cap seal becoming worn, the old cap seal may be replaced with a new one, and also to provide an improved cap seal which is replaceable with the cap seals already in use in the field.

Still another object of the invention is to incorporate in the cap seal of this type sealing material in sheet form, which is highly resistant to volatile and corrosive fluids disposed in safety cans of the type with which the cap seal of this invention is used.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end, my invention consists in the novel construction, arrangement, and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. 1 is a view in elevation, in cross section, illustrating one form of the cap seal or closure applied to a spout for a safety can;

Fig. 2 is a view in elevation, in cross section, illustrating a modified form of cap seal or closure applied 'to a spout of a safety can; and

Fig. 3 is a bottom view of the closure of Fig. l.

The improved cap seal or closure of my invention in one embodiment preferably comprises a metal cap-like member affixed to a stud for application to a lever-actuated operating mechanism for spout closures in which the lever-operating mechanism permits the spout closure to uniformly seat about the periphery of the open end of a spout of a safety can to which the closure is applied.

Instead of the usual cork or gas-treated seal formed of leather and the like material, the metal cap supports a resilient closure portion to support a thin sheet of material used as a seal which is highly resistant to the highly volatile fluids or liquids and corrosive liquids disposed within the safety can. In one embodiment, the metal closure member is 'annularly sealed to the sheet-like seal and hacking with a crimped annular bead forming a tight seal Patented Mar. 4, 1958 ice while in the other'embodiment, the metal cap member is affixed to the backing member and sheet-like seal with an annular angular crimp.

Referring to the drawings, one embodiment of my improved cap seal 5 is shown operatively affixed to a closure carrying member 6 of a lever-actuated operating mechanism for spout closures of the type as disclosed and claimed in the U. S. Patent to Lebus No. 2,574,876 granted November 13, 1951, with the cap closure in its closed position upon the open end of a spout 7 of a safety can of the type disclosed in the aforementioned patent.

The cap seal 5 preferably comprises a closure member 5 having an annular peripheral edge 9 and an upraised center portion 10 provided with an opening 11 to receive a stud-like member 12. The stud-like member is formed with a hollow rivet-like portion 13 formed by turning the rivet-like portion to a size to enter the opening 11, and forming the hollow portion 14 by drilling the extended portion 13 before it has been riveted over or staked to the position shown in Fig. l, ailixing an annular portion 15 of the closure member to the stud-like member 12. In the position shown, the stud-like member and closure member are rigidly aflixed together. Although it is preferred to form the stud-like member as described, it is within the scope of the invention that they may be suitably ailixed in any conventional manner without departing from the scope of the invention.

The stud-like member 12 for the size of cap seal or closure described is preferably formed from five-sixteenth inch diameter, stainless steel rod, and drilled at 16 to receive a suitable securing means 17 in the form of a rivet as shown riveted to a dome-shaped end 18 of the closure carrying member 6. The rivet extends through holes suitably drilled or formed in the dome-shaped end as shown, and the ends of the rivet suitably formed with heads 19, as shown in Fig. 3. The size of the rivet and the hole 16 through which it extends provide sufiicient clearance to provide a loose fit so that in the closed position of the closure carrying member 6 of the lever-actuated operating mechanism, the closure member will seal the spout opening and the spring-biased pressure applied to the closure carrying member applied by the inner face of this member to a rounded end 20 of the stud-like member 12 complementally formed to the inner surface 21 of the dome-shaped end.

The space within the closure member is of sufiicient depth to receive a soft sealing rubber member 22, disk-like in shape. It is preferred to form the soft sealing member from material known as Hycar from .120 inch to .135 inch in thickness and of 55-65 durometer hardness. Another suitable form of material for this member can be neoprene, Thiokol, cork, composition, etc.,each of which has high deterioration resistance. This member provides an inexpensive, resilient and soft seat for a sealing member 23. The sealing member is preferably formed from a soft-like material which is inexpensive and impervious to the various volatile and corrosive liquids and yet provides a tight seal for the spout opening, and conforms readily to the beaded edge 24 of the spout opening.

A preferred material is Teflon for the sealing member which is highly resistant to highly volatile liquids and corrosive liquids, and is a synthetic plastic material. The disk-like member is formed from substantially 0.008" thickness material but it can be satisfactorily made from substantially 0.001 to 0.030" material thickness. Other suitable synthetic elastomeric materials may be used without departing from the scope of the invention. In order to have a satisfactory cap seal, the material must have the qualities of a soft sealing rubber and the deterioration resistance of alsynthetic material such as the preferred Teflon or Rel-F. Although material of the type of polyethyleneplastics may be used, it has 'beenffound that it is not asimpervious and as resistant as Teflon or Kel-F." It is preferred to fabricate the sealing portion of the cap seal provided by the members 22 and 23 respectively from rubber and'ithei'synthetic plastic material rather than providing the entire :thickness .of the (two members from a single thickness, for-example; of oneeight inch,-Teflon.z Formed in 'tbismanner from a single'thickness, the expense of the seal thus formed would be prohibitive whereas if fabricated as disclosed, the; disk of rubber and the thin sheet-like disk 'of Teflon are approximately within the 'same nor'niual cost. The

members; 8 and 12 are preferably-formed from stainless steel, the stud member 12 being formed from fivegsixteenth inch me e s a nless eeltod andthe su 'emem r 8 in tqr sdi om; 2 case (-01 Stainless steel in sheet form. It is also to be understood that these members may be suitably' formed; from synthetic plastic materials, which would have substantially the same resistance to highly volatile and corrosive fluids as stainless steel. It is also to be understood thatthese members 8 and 12' may also be formed from sheet steel and suitably coated to have substantially the same resistance to the: volatile and corrosive liquids .as stainless steel without departing from the scope of the invention.

In assembling the individual parts to form the complete eap seal after the stud '12 has been staked, as described above, to the closure member 8 and with the annular periphery '9 as shown in the dotted position 9,, the. synthetic rubber gasket 22fformed from Hycar"-material the. disk 23 of the synthetic plastic Tefio11 is applied.

With the members assembled in this manner, the assembly is positioned within a suitable die and the extended edge of the annular periphery 9 from its, dotted positi0n9' is rolled over totorm "an annular bead 25, andthe inturned edge, thereof is securely pressed into the; peripheral edge of the member, 2 3 in the annular indented position 26 and; similarly indenting thememberZZ jannularly. Sufli- 7 cient pressure is applied in forming the annular beads 25 to provide a tight seal between the inturnededge of the.

head 25 and the member 23'as at 27'. from the above disclosure; it is quite apparent that a very simple, economical," and sturdy cap seal-is provided which has a sealing face which is impervious totcorrosive and highly volatile inflammable fluidsfand which will effectively seal the spout opening of a safety can. Although the capseal hasbeen particularly described for use with the spout opening of safety disposal cans or for spoutgopenings for the discharge of corrosive and inflammable volatile liquids,

thereof may be suitablyadapted for use with otherclo- 'sures such as radiator caps and gas tankcaps for automotive and'the like vehicles; a i 1 a Referring. to Fig. 2, there is illustrated another embodiment of the inventionand like or primed reference characterswill indicate the same or similar parts. The; a particular. difierence' of this embodiment over that of Fig.

:1 isin the 'method'of affixing the annular peripheral edge 9 to assembIejthe member'ZZ and the sealing member 23.

'In each embodiment, themembfers. are similarly formed,

the metal 'membersbeing preferably formed fror'nfstainless steel and the sealing membersll, and 23 being respectively formed from synthetic rubber and plastic materialsas previously described. V

.Inassembling the members forming the cap seal, the,

members 22 and 23 areinserted within the closure mem her 8 with the annular'peripheraledge 9 in its original drawn shape 2'. The assembled parts are then placed in .aflsuitable die and the extended edge formed to the .annular inturned angular position 25'. When formed in thismanner the abutting annularedge of the sealing member- 23 is termed to the indented complementally formed-shape 26. forming an annular tight seal 27'. In

theiformiug operation, the soft backing member 22 is isfirst assembled within the'closure member after which complementally, indented .anchc'omp'ressed m receive' 'the annular indentation 26' formed in the sealing member 23. 7

In either of these embodiments, an' efiective seal'is an.

nularly provided between the members. 22 and 23, and the corresponding annular periphery 9 at' the annular" seal provided which prevents any of the highly volatile from enteringthe interiorof I liquids or corrosive liquids the completed cap seal.

;It is evident from the embodimentsdisclosedthat an inexpensive, impervious, .and tight andsoft seal is pro vided o the spu t ps nsi o a vsafe y i po al using a spout closure withlever-actuatedoperating mecha L anism of the type with which it has, been disclosed. .It

is also obvious that when thecap closurebecomesgworn so that the sealing member 23 is worn through, the entire cap seal of each of the embodiments may be readily re- 7 placed.

While I haveillustrated several embodiments of a cap closure suitablefor disposal cans and.the like; it, is to. be. 7 understood thatit is,,withinthe scope of :the inventio'nfi that the cap seals of this, invention may be suitably that various immaterial modifications maybe -made in,the 7 same without departingfrom the spirit of my invention; hence, I do not wishlto be'understood as limiting myself to the ex'actform, construction, arrangement and *combi f nationfof parts herein shownanddescribedpand uses 7,

1O er r eq ing an e fecti e s al-.1

Having-thus descri ed my inventiomit is obvious mentioned.

'What I claim Patent is;

' '1. As an article of manHfacture,-a caplseal comprising V a fiat disk like metal closureljmember provided with-an annular peripheral member providing a space to receive a disk-like'soft backing member having the qualitiesof a soft sealingrubber and deterioration.resistance"of a synthetic elastomeric material andsubstantially within the range of thickness fr0rn"0.12( )"to 0.135? and adiskitis within 'the "scope of'the' invention that modifications like synthetic plastic sealing member substantially within the range of thickness: from 0.0011? to 0.030" formed from-a material resistant to volatile'inflammable liquids and corrosiveliquids in-abutting relationship, and the annular peripheral edge inturned in abutting relationship.

contiguous to the outer periphery-of the sealing'member and'the backing member; whereby a vapor tight seal is provided between the'annularedg e ofthe synthetic plastic sealing'mem'ber and'the closure member, and thesealing member and backing member areal-fixedto thefclosure v member, "said 'sealing m'emb'er providing a sealing face whichis impervious'to ivolatileinfiammable liquids'fandj a corrosive liquids, said inturned annularperipheral edge forming an annular head with the said inturned edge .thereof'indenting'the sealingime'mber and the backing member providing the. vapoittight seal,- anda'fiixing the members together. H

. 2. As an'article of manufacturma cap seal comprising. 7 aifiat disk-like metal closure member including an annular member forming an enclosed space, a 'soft backihg member substantially within'the range of thickuessifrpni 10.120 10 0.13 57 mounted within the spacegia syntheticv plastic sealing memberhaving the qualities of a softsealing rubber and deterioration resistance et a synthetic"- elastomeric material and substantiallywithinthe range.-

of thickness from 0.001 to 0.030 complementally formed .to the aforesaid soft-backing'member and highly resistive to volatile and corrosive liquids, and securing as new and. desire to secure Letters 1 means complementally formed to the periphery of the closure member and annulariy engaging the face of the sealing member contiguous to the periphery thereof, affixing the soft backing member and the sealing member within the closure member in abutting relationship where- 5 by the face of the sealing member provides a surface which is resistant to deterioration by volatile and corrosive liquids and a vapor tight seal is formed to volatile liquids between the outer periphery of any opening to which the seal is applied by the soft seat provided by the 10 soft backing member.

References Cited in the file of this patent UNITED STATES PATENTS Schroedter Dec. 16, 1902 DuBois Apr. 17 1917 Fink Nov. 24, 1936 Lebus Nov. 13, 1951 Vastano June 10, 1952 Dryer July 8, 1952 Miller et a1 Jan. 20, 1953 Underwood June 8, 1954 Teeters et a1 Dec. 27, 1955 FOREIGN PATENTS Germany Nov. 1, 1900 

